Quick answer

Ask your pharmacist or doctor before combining. The spironolactone label documents 2 supplement entries, potassium supplements and electrolyte products that contain potassium, and both carry the tag avoid. The label says patients should be advised to avoid potassium supplements and foods high in potassium, including salt substitutes, because potassium can rise severely.^1,2,3

Key facts

The spironolactone label says potassium supplements taken with it may lead to severe hyperkalemia, which means very high blood potassium.¹
MedlinePlus lists potassium supplements among the nonprescription products that may interact, and says to avoid potassium-containing salt substitutes.²
NIH says potassium-sparing diuretics such as spironolactone reduce the potassium lost in urine and can cause hyperkalemia.⁴
NIH says experts recommend monitoring potassium status in people who take these medicines.⁴
MedlinePlus also names ibuprofen, naproxen and aspirin among the nonprescription products that may interact. They are medicines, not supplements.⁵

What is spironolactone for, and what is unusual about it?

MedlinePlus says spironolactone is used for certain hormone and fluid conditions, for heart failure, and alone or with other medicines for high blood pressure. It belongs to a class called aldosterone receptor antagonists. It makes the kidneys pass water and sodium into the urine but reduces the loss of potassium, and that last part is the reason for this page.⁵

Why are potassium supplements singled out for spironolactone?

The label wording is direct, and MedlinePlus repeats it. When a medicine holds potassium in the body, a pill that adds potassium can push the level beyond what the kidneys clear, and NIH says even healthy people can reach that point with enough potassium from supplements or salt substitutes.^1,2,6

Avoid the combination unless your doctor advises it

The spironolactone label says potassium supplements taken with it may lead to severe hyperkalemia, and that patients should be advised to avoid potassium supplements and foods high in potassium, including salt substitutes.^1,2

On the medicine's label

Do electrolyte drinks and tablets matter too?

They can, if they contain potassium. NIH's health professional sheet lists spironolactone among the potassium-sparing diuretics that reduce potassium loss, and MedlinePlus lists spironolactone among the causes of too much potassium in the blood. The Supplement Facts panel of a drink mix shows whether potassium is in it.^3,7

Avoid the combination unless your doctor advises it

Spironolactone keeps potassium in the body. Its label says taking it with potassium supplements can lead to severe high potassium, and that patients should be advised to avoid potassium supplements and foods high in potassium, including salt substitutes.^3,7,8

On the medicine's label

What about salt substitutes and potassium-rich foods?

The label and MedlinePlus both reach past supplements. The label says patients should be advised to avoid foods high in potassium, including salt substitutes. MedlinePlus says to avoid potassium-containing salt substitutes and to talk with your doctor about how much potassium-rich food, such as bananas, prunes, raisins and orange juice, belongs in your diet.^1,5

Is there a list of vitamins that go with spironolactone?

No source on this page gives one. What the sources document is potassium. For any other vitamin or mineral, the sources checked do not address it. That is not a finding either way, so ask your pharmacist.

One related fact is worth knowing. NIH's magnesium sheet reports that potassium-sparing diuretics such as spironolactone reduce how much magnesium is lost in urine. It does not give advice about magnesium supplements, so treat it as a question for your pharmacist and not as an answer.⁹

What does the avoid tag mean for these two entries?

Both entries are on the label, and both carry avoid, the strongest of our four tags, because the label uses the word avoid itself. It is a statement about potassium supplements and potassium-rich foods and salt substitutes. It says nothing about other supplements.

What should you ask your pharmacist about spironolactone and supplements?

Do any of my supplements, multivitamins or drink mixes contain potassium?
Do I use a salt substitute, and is it a potassium one?
How much potassium-rich food is right for me with this medicine?
Which blood tests should I have, and how often?
Do my pain relievers, such as ibuprofen, naproxen or aspirin, matter here?

Questions people ask

What vitamins should you not take with spironolactone?

The sources document potassium supplements, and the label says to avoid them. For vitamins the sources checked do not address it, which is not a finding either way, so ask your pharmacist.¹

Can I take vitamins with spironolactone?

The label and MedlinePlus name potassium supplements, and NIH says a multivitamin can contain small amounts of potassium. Bring the Supplement Facts panel to your pharmacist and ask about each product.^1,2,10

What should you not take with spironolactone?

The label says to avoid potassium supplements and foods high in potassium, including salt substitutes. MedlinePlus also lists ibuprofen, naproxen and aspirin among products that may interact.^1,5

Do electrolyte drinks interact with spironolactone?

They can if they contain potassium. The label warns about potassium supplements, and NIH names spironolactone among the medicines that reduce potassium loss.^1,3

What supplements interact with spironolactone?

Potassium supplements and electrolyte products that contain potassium are documented. NIH also notes an effect on magnesium loss without advice. Anything else is not addressed by the sources checked, so ask your pharmacist.^1,9

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This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.